Cotter-pin.



A. H. BERNTSEN & P. P, KILSTOFTE. UOTTER PIN.

APPLIUATION IILED MAY 22, 1911.

1, 1 07,88 1 Patented Aug. 18, 1914.

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AKSEL H. BZERNTS'EN AND PEDER P. KILSTOFTE, OF WAUPUN, WISCGNSIN.

CUTTER-PIN.

Specification of Letters Patent.

Application filed May 22, 1911.

Patented Aug. 18, 1914:.

Serial No. 628,866.

1;1- not broken and destroyed in bein removed,

wvhich may, therefore, be used or a long thou h removed and re lacedfrequently, an which will'be equal y as secure as the ordinary form ofcotter pins now in 'lthe ordinary cotter now in use re- 1 iuirethe endsto be spread apart to keep em in position. The ends must be benttogether again to remove the pins. Some 7 kind of a tool is necessary tospread the ends a artand to bend them together again and t ebendihgof-the ends destroys the pins in a veryshort time. A singleremoval of such I a cotter 'pin is frequently the entire period of ,30the lifeofthe pin.

1 I This invention provides a cotter pin, which. may be of any preferredor desired shape in cross section, with a latch member whlch'servesto,lock the pin in place so that .85 it cannot become displaced, thelatch being.

of such construction that it can be readily manipulated by the fingersto lock or unloc Referring to the drawings which accompany thisspecification and form a part thereof, which drawings illustrate anembodiment of this invention, and on which I "drawings the samereference characters are used to designate the same elements whereverthey may appear "in each of the several views, Figure 1 is'an elevationof a cotter pin secured to a shaft; Fig. 2 is a cross sectional view ofthe shaft and pin, taken on the line H on Fi 1, looking in the directionindicated b t 'e arrows; and Fig. 3 is a cross sectiona view ofthe pin,taken on the line 12- -6 on Fig. 2, looking in the direction indicatedby the arrows.

Referring specifically to the drawings, the

reference numeral 1 designates a member,

sii'ch as a shaft for example, with which it is desirable to use acotter pin. Tihis member 1 is rovided with an aperture 2 for thereception of the pin. This aperture may be of any preferred or dcfrcdshape in cross section, and, preferably, the pin will conform to theshape of the aperture, though it need not necessarily. Figs. 1, 2 and 3of the drawings illustrate a cylindrical pin and the member 1 is shownas provided with a cylindrical aperture.

Referring to Figs. 1, 2 and 3 of the drawings, the reference numeral 3designates a cylindrical pin to which is secured a latch member 5.Preferably the latch member 5 is made from sprin wire and it is shapedso as to pass around t e member in which the pin is placed, as clearlyshown by the drawings. The latch member 5 may be secured to the pin, 3in any suitable manner. As illustrated by the drawings one end of thelatch member 5 may be bent into a U-shape and passed through holes 4 and6 in the pin with the extreme end 7 bent over against the pin as shown.The other end of the pin 3 is provided with an aperture or hole 8 inwhich the free end of the latch member 5 is received. The latch member 5is bent into one or more coils 9 to increase its springiness orflexibility and, preferably, its free end 10 is bent back upon itself toform a hook, as clearly shown by Fig. 3 of the drawings, 50 that thespringiness of the latch member will hold the free extremity in the hole8 in a manner which will be readily understood. With this constructionthe latch member 5 must have sufficient range of me cment to- Ward themember 1 so that its fre end can be engaged in the hole 8 and (ii:ngaged therefrom. The latch member 5 an be made flexible enough so thatit an be readily sprung into engagement wmh the pin or out of engagementtherewith 1y the use of the fingers only and it shold he noted that thelatch member should have a range of flexibility sufficient to enable itto straddle the member in which the pin is to be used.

It will be readily seen that cotter pins embodying this invention may beplaced in position or removed without the use of tools and that suchcotter pins may be removed and replaced an indefinite number of times.

What is claimed is:

' A cotter pin composed of a pin provided with apei'ture in one endthereof and a In Witness whereof We hereto aflf on; 121150 1 mombersecured to the other end theresignzxtures in presence of two Witnes s.

"i'no mid latch memberheing provided ASKEL H. BERN'LSEN. ith spring coil9 and haying its free end PEDER P. KILS TOFTE, 'foerot back upon itselfto form a hook to pass Witnesses: into the woerture in the pin from theoppo- ANTON GRAVESEIN, site side or the pin. fi'om anhe spring coil 9.BEN KASTEIN Homes this patent ho o'btaissefil for five o'nts each, byafidressing the Commissioner of ZPatents,

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